Piston.



A. RIFR'IBIL.

Plsow. v l K SAPPUCATIQN man Muze. 191s. 1,282,936; l "Patented 00u29,1918.

wenn@ KQPIJI aum/wup A. R. PRIBII..

PISTON.

APPLICATION FILED DEC-26. 1916.

anonimiein@ UNITED sm IJATEN T OFFICE.

ALEXIS R. PRIBIL, OF WILKINSBURG, PENNSYLVANIA.

To all whom t may concern:

e it known'that I, ALEXIS RQ PR1B1L,.a cititen of the United States ofAmerica, re-

'.siding atlVilkinsburg, in the county of Al? and lubricating means.

ments in Pistons, of which the following is a specification, referencebeing hadA therein to the accompanying drawings.

This invention relates to pistons, and more particularly to a pistonbody made of a single piece of pressed steel in contredistinction topiston bodies that are cast vfrom metal.`

^ The primary object of my invention is to provide a lpressed stee'lpiston body or shell wherein positive and reliable means are ernployed,as hereinafter set forth, for transferring compression strains direct tothe con-- necting rod of the piston, instead of the pressed steel bodyor piston skirt, thus uti`l lizing the body or shell more as a guideAnother object of my inventionjis to pro# vide a piston lof the abovetype with a pin support adapted to coperate with the walls i of thepressed steel pistonbody-in supporting the pin bearings and a piston pinby which the piston body may be connected -to a connesting rod, forinstance of that type discompanion application filed under even date. 1

A further object of this invention is to provide a simple durable andinexpensive pressed steel piston body with inset pin bearine,f holdcr'saffording lubricant pockets in the side walls of the piston body, sothat the piston pin or parts thereon may be thoroughly lubricated and alubricant seal maintainedi between the piston and cylinderwalls.

A still further object of my invention is to provide a. pressed steelpiston body in connection with which various types of piston innr aboutan engine.

Furthermore. my invention allows metals to be used in pistonconstructions that were heretofore impossible for a good plston.

l legheny and State of Pennsylvania, have in-4 vented certain new anduseful Improve- Specication of Letters` Patent. Patented 0013. 29, 1918.Application led December 26, 1918.l Serial No. 138,956.

specifically described and then claimed, and

reference will now be had to the drawing, .wherein- Figure 1 is avertical cross sectional viewv In the drawing, the referencenumerai '1denotes a pressed steel hollow piston body having the upper or outer endthereof reduced, as at 2, to'provide an annular seat or shoulder 3.Brazed, spot welded, shrunk or otherwise secured t0 the reduced end 2 ofthe body 1 is a retainer shell 4, Vsomewhatnin the form of a cap, saidshell having the periphv eral edges thereof confronting the seat orshoulder 3 to coperate therewith in providing an annular groove or way 5for piston rings 6. The rings 6 are `fixed or loose' relative to thereduced end 2 of the piston body and of any conventional form.

Diametricallybpposed walls of the body 1 are provided with` insettubular holders 7 for pin bearings 8, andthe annular inset portion ofthe piston body provides lnbriv cant pockets 9 at the outer ends of theheiders 7 and the bearings 8. The bearings 8 may be fixed within theholders 7 and limitm ing the inward movement of said bearings are Hangesl0 on `the crier ends thereof, The bearings 8 are of La 'g ater lengththan the holders 7 and theljinner-confronting ends -thereof extend intotubular bearings '11 forming part of a yoke or inverted U shape pin'support 12 mounted in the piston body and suitably connected tothereduced end 2 thereof. The yoke or support 12 co-l operates with thereduced end of the piston body and the retainer shell or cap 4 inproviding a three-ply thickness centrally of the pistonl head/and saidyoke is made of a thicker or heavier material than the piston body, andto stiften and add rigidity to said yoke or supports, the side edgesthereof are hanged, as at 13, with the ange surround ingl the bearings11, as shown in Fig. 1. with the yoke so made disposed, it Mves a numberof purposes :Mirsh 'i' heat, and third, it allows light metal .to beused for the body or ,Sli-int of `the piston,

Besides the yoke or support 12 coperating with the holders 7.irijretaining the bearings 8 iii position to receive a piston pin 14,

vsaid yoke or support disseminates heat in the plston body by, radiatingthe same, thus reducing ex ansion `and contraction to a minimum.-higinsu'res more accurate litting of thepstonbodyrelative to the wallsof the cylinder, andcoperating with the piston ring- 6l is anoth'erringor rings 15 ari 21 in said ranged in'an annular groove or grooveway 16in the lower or inner end of 'the piston body. The groove or way 16 maybe rolled or otherwise pressed Yin the body, and it is preferable torovide the inner end of the body With an inturned iange 17.

In Figs. 3 and ha piston body orshell 18 is made from Aflat hot-rolledblue aniealed open-hearth steel and when rolled is provided with thenecessary grooves 19 and4 inturned or hanged edges. The fiat stock canthen be given a cylindrical form and thel longitudinal edges buttweldedor otherwise joined, thus forming a piston shell in a few operationsthat possesses all 'the qualifications of a good piston body.

When producing the piston body a head 20 is inserted and locked inposition and this head is made of a heavier material than the pistonbody, so, also, a yoke or pin su port Otherwise, the bearings and other.pans .are as heretofore mentioned.

the wall of sald body, and hav' y y bearing on the closed end .of saidbody and' dy and connected to said eed.

What I claimis:- i 1.V A piston of. the type described comprising a bodyprovided' with tubular holders and an outer permanently closed end, andI:

heat radiating means in spaced relation to a flat wide provided withbearings alinng with the tubular holders of said body.

2. A piston of the type described comprisingi a body havingdlamet-rically opposed wals thereof provided with inset 'tubularholders-affording pockets in the Wallsof the pistonl body, and aninvertediU shaped flanged support in said.- pistonl body having.bearings allning with the tubular holders 'with bearings' alinng withsaid y tubular holders. l

, In testimonywhereof I affix my signature in thepresenee oftwovwitnesses.

l l ALEXIS R. PRIBIL. -Wtnesses: KARL H: BUTLER,

ANNA M. Domi.`

e type described com-y

